Improved chuck for holding fifes and tubes while being screw-threaded



waited 5mm @wat miliare.

.WILLIAM ooL-E., oir-'NEW vonk, Y.

Letters Patent N 106,551, zia-ted August 23, 1870.

IMPRovnD CHUCK PoR HOLDING Pipes am:4 rrnans WHILE BEING scRnw-THREADED.

- The Schedule referred to in these Letters Patent and making ofthe same 4To'all whom it may concern p Be it known that I, WILLIAM T.- COLE, of the city, county, and State of New York, have invented a new and useful Improvement in Chucks for Holding Pipes and Tubes while being Screw-Threaded; and I do hereby declare that the following vis a full, clear,`and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of' this specification.

This invention relates to4 chucks, and more particularly to those which are employed to hold a rod or tube while a tln'ead is being -cut thereon. Y

The objects contemplated by this improvement are- First, to enablel the rod 0r pipe to be at once removed after being threaded, without injuring the thread.

Second, -to do it without reversing the chuck.

Third, to do it instantaneously at the will of the operator. v

The invention consists in certain instrumentalities which will bellereinafter specified.

lIn the 4accompanying drawing- Ifigure l represents a face view ol' the chuck, partly in section, showing the general arrangement oi' the parts.

Figure 2 is a crosssection of iig. 1, on the line xx.

Similar letters of reference indicate corresponding part-s. l, i

A represents the disk, which isfastened to the end of a tubular spindle, and revolved by means of gearing, or in any suitable manner.

1) represents a double-flanged circular slotted plate, which is attached to the disk A by the screws G. These screws pass through slot-holes D in the plate, and enter studs on the disk, as indicated hy dotted lines in fig. 1.

The platc'is held in place hy the'heads of the screws, but the slot being curved, or on a circle described from the center of the. chuck, the plate is allowed to move around vthe center sufficiently to operate one or more pawls for fastening the pipe in the disk.

In this example ci' my invention, l show but one fasteningdever pawl E, and that partly in dotted lilies, but any required number may be used.

The pipe is shown at F, with thc toc of the pawl in Contact therewith.

The pawl is pivote-.d to the disk, as seen at'G.

Its arm extends to near the' rim of the disk, where it is contiued in a V-socket, h la, on the inne;` side of the circular slotted pla-tc B, so that the movement of the pa'wl is governed by, the movement oi' the plate,

and the pipe to be `cut is fastened and 4loosened by one or the other of these movements.

yor lathe,) at the point q.

Itis a dog, which is pivoted to the disk A, which' project-s outward from theV periphery of the disk, as seen in the drawing.

The disk revolves in the direct-ion of the arrow, carrying with it the plate B, the friction-band being held stationary when the machine is'in operation by means of the pin S ou the bar, and the hook K, the

end of the bar being elevated by the attendant for Y this purpose. Y i

The chuck is represented in the drawing-as in operation, or as 4holding and revolving the pipe F for 'the cutting of the screw upon its end.

The friction produced by the band overcomes the resist-ance caused by the dies in cutting thc thread, and holds the plate B, and consequently the fastening paul, inthe position seen. g The cutting-dies used withthis machine should be attached to jaws, which open and close, and which, may be instantly released from the tube when the thread is cut. lIt is' consequently unnecessary to rcversc the motion oi', the machine to release the pipe.

The pipe is removed as soon as the dies are with` drawn, and itis released from the fastening-pand.

This release is accomplished by depressing the bar O, and allowing the friction-band to move with the disk until the dog It comes in contact with a hook, T, on the bent lever or bar O.

This contact changes the posit-ion of the dog R, and` forces the plate l to make a sudden movement forward, (which is allowed by the slots 1),) and' this movement throws the fasteningpawl from the pipe.

K is a blockattached to the side of plate B, against which one end'ot' pivoted lever It presses when the other is caught by the hook T. l

This has the effect of throwing the plate forward to the end 0i' its arc slot, by which time the end of lever light-:comes disengaged from the hook T, and the rod or pipe is unclamped.

' The pipe is now removed without in any manner bruising or marl-ing the thread, and another pipe is By'this'arrangement the power that drives'the ula-- chine coujointly with `the friction-hand when held stationary is made to hold Vthe pipe Ywhile the thread is heilig cnt, and without stopping or retarding the motion of the chuck.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The slotted circular-plate B, having socket h h thereon, disk A, and lever E, all combined, arranged, and relatively constructed as and for thepurpose described.

2. The disk A,.plate B, hand J K, and lever O, having pin S thereon, all combined, arranged, and rela-tively constructed as and for the purpose described.

3. The hook T, dog or lever R, block IQplate` B, and disk A, all combined, arranged, and relatively constructed as and for the purpose descrihed.-

.4. The hook-leverO S T, band 1 K, slotted socketplate B, dog R, block K, lever E, and disk Aall combined, arranged, and relatii-'elyconstructed to form Y a chuck, as set for-th.

Witnesses:

GEO. W. MABEE, ALEX. F. ROBERTS.

WILLIAM T. COLE.l 

